(4x)^2+2.4x.3+3^2-4x^2-14x+10x-35=30
16x^2+24x+9-4x^2-14x+10x-35=30
12x^2-10x-26=30
x(12x-10)=4
12x=-10
x=-5/6
vây x=-5/6
(4x)^2+2.4x.3+3^2-4x^2-14x+10x-35=30
16x^2+24x+9-4x^2-14x+10x-35=30
12x^2-10x-26=30
x(12x-10)=4
12x=-10
x=-5/6
vây x=-5/6
Tìm x, biết:
a) 4x2-12x=-9
b) (5-2x)(2x+7)=4x2-25
c) x3+27+(x+3)(x-9)=0
d) 4(2x+7)2-9(x+3)2=0
Tìm x biết :
a) 3x(12x - 4 ) - 9x( 4x - 3 ) = 30
b) x( 5 - 2x ) + 2x ( x - 1 ) = 15
Tìm x, biết:
a) 3x ( 12x – 4 ) – 9x ( 4x – 3 ) = 30
b) x ( 5 – 2x ) + 2x ( x – 1 ) = 15
Bai1:tìm x biết.
a)4×(x-5)-(x-1)×(4x-3)=5
b) (3x-4)×(x-2)=3x×(x-9)-3
c)(x-5)×(x-4)-(x+1)×(x-2)=7
d)(2x-1)×(x-2)-(x+3)×(2x-7)=3
tìm x
a) (x-5)(x+5) = (x-2)
b) (3-2x)2 - (x-5)(4x+3)= 2(x+5)
c) (7-x)(2x-5)-(7-x)2x= 3(-5+x)
Tìm x,biết :
a) 2x^2-7x+5=0
b) x(2x-5) - 4x+10=0
c) (x-5)(x+5) - x(x-2)=15
d) x^2(2x-3) - 12+8x=0
e) x(x - 1)+5x - 5=0
f) (2x-3)^2 - 4x(x - 1)=5
g) x(5 - 2x)+2x(x - 1)=13
h)2(x+5)(2x - 5)+(x - 1)(5 - 2x)=0
tìm x biết
a, x(2x-7)-4x+14=0
b, x(x-1)+2x-2=0
c, 2x^3+3x^2+2x+3=0
d, x^3+6x^2+11x+6=0
bài 2: Tìm x,biết :(cách làm nữa nhé )
a) 9x2 -49=0
b)(x+3)(x2 -3x+9)-x(x-1)(x+1)-27=0
c) (x-1)(x+2)-x-2=0
d)x(3x +2)+( x+1)2 -(2x-5)(2x+5) = 0
e) (4x+1)(x-2)-(2x-3)(2x+1)=7
Tìm x thuộc Z để thương có giá trị nguyên:
a/ 3x^3+13x^2-7x+5 : 3x-2
b/ 2x^5+4x^4-7x^3-44 : 2x^2-7